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JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 8 



brownish band which does not touch the lateral margins. Second segment some- 

 times pale yellowish near median portion. Eyes dark reddish; antennae with the 

 basal segment black, otherwise pale yellowish. Legs shining blackish; coxae, tro- 

 chanters and tarsi pale yellowish, except the tip and claws. 



Stage II (PI. 24, fig. 3). — Length, 1.68 mm.; width of head including eyes .72 mm. 

 Differs from preceding stage only in size, in that the head is not proportionately so 

 large or abdomen so narrow and hind margin of metathorax is somewhat procurved. 



Stage III (PI. 24, fig. 4). — Length, 2.4 mm. ; width of head including eyes .975 mm. ; 

 width of abdomen, .75 mm. General color blackish; whole dorsal surface and 

 legs finely punctate so that it is not so shiny as in the two preceding stages. Antennae 

 dark, eyes dark reddish. Tibiae at tip, and tarsi, except at tip, pale yellowish. First 

 abdominal segment almost entirely pale yellowish, second pale yellowish on hind 

 margin and towards lateral margins. Wing-pads slightly apparent. 



Stage IV (PI. 24, fig. 5). — Length, 3.1 mm.; width of head including eyes, 1.2 mm.; 

 width of abdomen .9 mm. As in preceding stage but legs have a tendency to be 

 brownish rather than blackish; femora at base, tibiae at tip and tarsi except extreme 

 tip, and the claws, pale yellowish; femora above light brownish towards tip. The 

 whole of the first abdominal segment and the hind margin and an obhque streak near 

 each lateral margin of second, pale yellowish. Metathoracic wing-pads reach back- 

 ward to about second half of third abdominal segment and mesothoracic wing-pads 

 almost as far. 



Stage V (PL 24, fig. 6)— Length, 4.3 mm.; width of head, including eyes 1.5 mm. 

 As in preceding stage except that tibiae are lighter, the terminal half of the fore tibiae 

 pale yellowish; the wing-pads reach back to fifth abdominal segment and the head and 

 thorax are sparsely sprinkled with fine, short, pale hairs. 



In all of the stages, when actively feeding, the abdomen of the nymphs may 

 frequently become distended with food so that the intersegmental areas show as 

 red bands between the segments. 



Adult (PI. 24, fig. 7).— This species is described by Osborn & Ball (1898) as follows: 



Fulvous brown, resembling maculipennis, but with a broad yellow stripe on the 

 clavus. Length, 9 5.3 mm.; 5 mm.; width, 1.7 mm. Face as in maculipennis in 

 both sexes, pronotum lacking the black spots and the light margin, the two outer spots 

 smaller, the middle one elongate; scutellum entirely rufous, darker in the male. 

 El3^ra fulvous brown, the nervures indistinct, scutellar margin black; just outside 

 this to the margin of the clavus and extending back to just before the apex of the 

 outer claval nervure where it rounds off is a distinct bright yellow area ; costal margin 

 with a hyaline spot before the tip. 



"Structurally very close to maculipennis, slightly smaUer, readily distinguished by 

 the bright yellow clavus." 



Some of the specimens which I have before me have the pronotum and 

 scutellum black, except for a small median spot at the cephahc border 

 of the former and for the caudal border of the latter, which are yellow. 

 The face is yellow with three black stripes, one median and one ex- 

 tending from each eye to the base of the beak. 



Following Osborn and Ball I have used, in this paper, the name 

 Idiocerus provancheri Van Duzee, although I am not convinced that 

 this is the correct name to apply to the species under discussion. 

 This insect was first described by Provancher in 1890 under the name 

 Bythoscopus cUtellarius, which he erroneously ascribed to Fitch, giv- 



